mbavers
Senior Member
Case 580SK, 12 ply rating, 19.5L 24 rear tires. Bought rear tires new some years ago. YKS, made in Thailand. Outer rubber started cracking around the second or third year. Not heavily used. I originally aired them according to the manual, which states 24 psi. I just found another place in the manual that states 8 pr:20psi, 10 pr:24 psi. Since mine are 12PR I increased pressure to 28psi. I cannot find recommended pressure info anywhere on the tire, and cannot find the tire on any website. Does 28psi seem reasonable? Also, could low pressure have contributed to the cracking?